In other words, 0.00000260 paces is 0.00158 times the length of a Grain of Sand, and the length of a Grain of Sand is 633 times that amount.

(medium grain)Composed mainly of quartz, mica, feldspar, or magnetite, a grain of sand measures an average of 0.00164 paces. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 19.80 paces in height.